Nuvair Pro Trio User manual

User Manual
Pro Trio Analyzer
O2/CO/CO2Analyzer
REV: 03.19

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If you have any questions on this equipment please contact Technical Support at:
Nuvair
1600 Beacon Pl
Oxnard, CA 93033
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Hours: Monday through Friday
8:00 AM to 5:00 PM PST USA
This User Manual contains important safety information and should always be available
to those personnel operating this equipment. Read, understand, and retain all
instructions before operating this equipment to prevent injury or equipment damage.
Every effort was made to ensure the accuracy of the information contained within this manual; however,
we retain the right to modify its contents without notice. If you have problems or questions after reading
the manual, stop and call for information.

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Table of Contents
Introduction ................................................................................................................................................5
1.0 System Description .......................................................................................................................6
1.1 Identification of Analyzer Components...........................................................................................7
2.0 Individual Specifications of the Analyzers..............................................................................9
2.1 Oxygen Sensor:................................................................................................................................9
2.1 Carbon Monoxide Sensor:...............................................................................................................9
2.2 Carbon Dioxide Sensor: ...................................................................................................................9
3.0 Requirements for Operation of Analyzer Trio......................................................................10
3.1 Gas Flow ........................................................................................................................................10
3.2 AC Power .......................................................................................................................................10
3.3 Gas Sensors....................................................................................................................................10
4.0 Calibration......................................................................................................................................11
5.0 Operation of Analyzer Trio ........................................................................................................12
5.1 Turning on Analyzers:....................................................................................................................12
5.2 Threshold Alarms...........................................................................................................................14
Each Analyzer has independent threshold alarms that are user programmable....................................14
5.3 Powering off ..................................................................................................................................14
Hold down the On/Off button for a couple of seconds on each of the analyzers in the Analyzer Trio.
The Analyzer will display “OFF” and then go blank. ................................................................................14
6.0 Factory Reset................................................................................................................................14
7.0 Maintenance ..................................................................................................................................15
7.1 Analyzer Care.................................................................................................................................15
7.2 Battery Replacement.....................................................................................................................16
7.3 Sensor Replacement......................................................................................................................16
8.0 Programming of the Analyzers in the Analyzer Trio ..........................................................16
9.0 Pro O2Alarm Analyzer................................................................................................................17
9.1 Pro O2 Analyzer Controls ...............................................................................................................18
9.2 O2Analyzer Alarm .........................................................................................................................18
9.3 O2Analyzer Sensor ........................................................................................................................18
9.4 Pro O2Calibration Methods ..........................................................................................................19
9.5 Pro O2 Analyzer Operation............................................................................................................20
9.6 Programming Procedures..............................................................................................................21
9.7 Alarm Setting (AL 1 & Al 2) ...........................................................................................................22
9.8 Full Scale Value Setting (FSC) ........................................................................................................22
9.9 Calibration Oxygen Value (O2c) ....................................................................................................22
9.10 Threshold Alarms.......................................................................................................................23
9.11 Powering on and warming up....................................................................................................23
9.12 Powering Off ..............................................................................................................................24
9.13 Factory Reset .............................................................................................................................24
10.0 Pro CO2Carbon Dioxide Analyzer .......................................................................................24
10.1 Pro CO2Controls ........................................................................................................................25
10.2 Pro CO2Display ..........................................................................................................................25
10.3 Pro CO2Alarm ............................................................................................................................26
10.4 Pro CO2Sensor...........................................................................................................................26
10.5 Pro CO2Calibration ....................................................................................................................26
10.6 Pro CO2Operation .....................................................................................................................27

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10.7 Pro CO2Sample Flow Method of Checking Calibration (Preferred) ..........................................28
10.8 Pro CO2Programming Procedures.............................................................................................29
10.9 Pro CO2Alarm Setting (AL 1 & AL 2) ..........................................................................................30
10.10 Pro CO2Full Scale Value Setting (FSC) .......................................................................................30
10.11 Pro CO2Threshold Alarms .........................................................................................................30
10.12 Pro CO2Powering Off.................................................................................................................31
10.13 Pro CO2Factory Reset................................................................................................................31
10.14 Pro CO2Sensor Replacement.....................................................................................................31
11.0 Pro CO Carbon Monoxide Analyzer.....................................................................................32
11.1 Pro CO Analyzer Controls...........................................................................................................33
11.2 Pro CO Display............................................................................................................................33
11.3 Pro CO Alarm .............................................................................................................................33
11.4 Pro CO Sensor ............................................................................................................................33
11.5 Pro CO Calibration .....................................................................................................................33
11.6 Pro CO Operation.......................................................................................................................34
11.7 Pro CO Sample Flow Method of Checking Calibration ..............................................................36
11.8 Pro CO Programming Procedures..............................................................................................37
11.9 Pro CO Alarm Setting (AL 1 & Al 2) ............................................................................................38
11.10 Full Scale Value Setting (FSC).....................................................................................................38
11.11 Conversion Value of Carbon Monoxide Sensor (nA) .................................................................38
11.12 Gain Factor (Fct).........................................................................................................................39
11.13 Pro CO Threshold Alarms...........................................................................................................40
11.14 Powering Off the Pro CO............................................................................................................40
11.15 Pro CO Factory Reset .................................................................................................................40
11.16 Pro CO Sensor Replacement......................................................................................................40
11.17 Handling Pro CO Sensors ...........................................................................................................41
12.0 Spares and Accessories.................................................................................................................42
12.1 Calibration Equipment...............................................................................................................42
12.2 Replacement Sensors.................................................................................................................42
12.2.1 O2Replacement Sensor P/N 9507 .........................................................................................42
12.2.2 CO Replacement Sensor P/N 9501.........................................................................................42
12.3 Flow Restrictors and Regulators................................................................................................43
13.0 Troubleshooting .......................................................................................................................43
14.0 Relay Output Schematics.......................................................................................................44

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Introduction
This manual will assist you in the proper set-up, operation and maintenance of the Analyzer
Trio. Be sure to read the entire manual.
Throughout this manual we will use certain words to call your attention to conditions, practices
or techniques that may directly affect your safety. Pay particular attention to information
introduced by the following signal words:
This indicates an imminently hazardous situation, which if not avoided, will result in
serious personal injury or death.
This indicates a potentially hazardous situation, which if not avoided, could result in
serious personal injury or death.
This indicates a potentially hazardous situation, which if not avoided, may result in
minor or moderate injury. It may also be used to alert against unsafe practices.
This notifies people of installation, operation or maintenance information which is
important but not hazard-related.
Warnings
Graphics
Defined:
Gas Inhalation Skin damage
Abbreviations commonly used in this manual:
CO Carbon Monoxide O2Oxygen
CO% Carbon Monoxide Percentage of Gas LP Low Pressure
PPM Parts Per Million HP High Pressure
psi Pounds Per Square Inch L/min Liters Per Minute
HT High Temperature ATM Atmospheric Pressure

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1.0System Description
The Nuvair Analyzer Trio measures Oxygen (O2), Carbon Dioxide (CO2), and Carbon Monoxide
(CO) levels in supplied gases. All Analyzers are in a water resistant, impact resistant case with
a clear cover that allows for viewing of all gas displays, visual alarms and easy access to
analyzer controls. This unit is compatible with outdoor and marine environments.
The internal sensors are plumbed together to monitor a single input. Pressurized gases must be
regulated down to atmospheric pressure to avoid damage to the analyzer. The sample flow
rate must be between 1.0 to 5.0 L/min for an accurate reading.
The Analyzer Trio has visual and optional audible alarms for each of the gases monitored. An
audible alarm will sound if any alarm set point is reached.
All analyzers must be calibrated with an appropriate certified calibration gas before operation.
Battery powered units will come equipped with a Lithium battery and dedicated charger. The
Lithium battery charger may also be used as a constant power source. If the user chooses to
use the charger as a power source for an extended period, it is recommended that the Lithium
battery be disconnected from the analyzers to avoid battery damage.
This analyzer is designed for use at atmospheric pressures only. It is not designed for
exposures in a hyperbaric chamber. Use of this analyzer in a hyperbaric chamber will
result in incorrect readings and may damage the unit.
Although the Analyzer is a rugged instrument, careless handling or abuse may result
in damage to the Analyzer components resulting in inaccurate gas analysis. Inaccurate
gas analysis can lead to serious personal injury or death.
Extreme Gas exposure levels directed at the Analyzer sensors may damage the
sensors.

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1.1 Identification of Analyzer Components
On/Off
Button
Adjust
Button
Program
Button
Oxygen
Analyzer
Display
Carbon
Monoxide
Analyzer
Display
Carbon
Dioxide
Analyzer
Display
Gas In
Audible Piezo Alarm
A/C Power Input
(Optional)
Front Cover Locks
Carbon
Monoxide
Alarm Light
Oxygen
Analyzer
Alarm Light
Carbon
Dioxide
Analyzer
Alarm Light

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Lithium Battery
(Optional)
CO Sensor
P/N 9501
CO
2
Sensor
Send to Nuvair for
replacement
Oxygen Sensor
P/N 9507

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2.0Individual Specifications of the Analyzers
Note: All specifications are at ambient / sea level, 77°F / 25°C. Decreased accuracy when operated out of range or in
inconsistent environmental conditions.
2.1 Oxygen Sensor:
Sensor Type:.................................................. Electrochemical w/ 3.5mm Molex Jack connect
Expected Sensor Life, Room Air: ................... 3 Years
Range:............................................................ 0 - 100.0% Oxygen (0-1 ATA PPO2)
Accuracy: ....................................................... +/- 1%
Response Time (T90):.................................... < 6 Seconds
Drift: .............................................................. < 1% Volume O2 /month @ ATM
Operating Temperature: ............................... 32-104°F (0-40°C) Decreased Accuracy when out of range
Storage Temperature: .................................. 32-122°F (0 to 50°C)
Linearity Error: .............................................. = 2% @ 100% O2applied for 5 min.
Influence of Humidity:................................... -0.03% rel. O2reading/%RH
Operating Pressure: ...................................... Not to Exceed One Atmosphere Absolute (0 psi)
Humidity (non-condensing): ......................... up to 99% rh
2.1 Carbon Monoxide Sensor:
Sensor Type:.................................................. Electrochemical
Expected Sensor Life, Room Air: ................... 2 Years
Range:............................................................ 0 – 50 ppm CO
Accuracy (Resolution): .................................. 1 ppm
Response Time (T90):.................................... < 50 Seconds
Drift: .............................................................. <5% per annum
Operating Temperature: ............................... 14-122°F (-10-50°C) Decreased Accuracy when out of range
Storage Temperature:................................... 14 - 140°F (-10 - 60°C)
Operating Pressure: ...................................... Not to Exceed One Atmosphere Absolute (0 psi)
Humidity:....................................................... 15 - 90% Continuous, 0 - 99% Intermittent
2.2 Carbon Dioxide Sensor:
Sensor Type:.................................................. Non-dispersive Infrared (NDIR)
Expected Sensor Life, Room Air: ................... 5 Years
Range:............................................................ 0 – 2000 ppm CO2
Accuracy (Resolution): .................................. 1 ppm
Warm Up:...................................................... 1-10 min +/- 0.2% of range
Response Time (T90):.................................... < 30 Seconds (1-10 min Warm up)
Drift: .............................................................. +/- 1% / month @ 60°C (68°F) ambient
Operating Temperature: ............................... -4-122°F (-20-50°C) Decreased Accuracy when out of range
Storage Temperature:................................... -4-122°F (-20-50°C)
Operating Pressure: ...................................... Not to Exceed One Atmosphere Absolute (0 psi)
Humidity:....................................................... 0 to 95% rh, non-condensing

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3.0 Requirements for Operation of Analyzer Trio
The Analyzer Trio will require the following connections.
1. Constant gas flow reduced to 1.0 to 5.0 L/min at ATA.
2. Either proper electrical supply to the cord for non-battery units, or 110Volt, 60Hz AC
Outlet to power the lithium battery charger if so equipped.
3.1 Gas Flow
Before using the Analyzer Trio you must connect the analyzer to your
compressor system by diverting regulated gas to the analyzer. This will
require the use of a flow restrictor to reduce the gas to 1.0 – 5.0 L/Min
input. Nuvair sells 3 L/Min flow restrictors for this purpose.See Spares
and Accessories section.
3.2 AC Power
Use the provided AC power supply to plug into 110V power.
For lithium battery powered analyzers, the battery charger may be used as a constant power
supply. It is recommended that should the user choose to do this, the lithium battery should be
disconnected from the system to avoid damage to the cells.
3.3 Gas Sensors
The Analyzer Trio uses three individual analyzers and sensors to measure content in gases of
O2, CO2and CO. The O2, CO2 and CO Sensors are disposable and user-replaceable. The life
expectancy of the O2 sensor is 3 years. The life expectancy of the CO sensor is 4 years. The
life expectancy of the CO2sensor is 5 years. The Sensors are designed for use at atmospheric
pressure. The sample gas mixture to be analyzed must be regulated and any potential pressure
or vacuum must be avoided. Vibration, oil, moisture and particles (contamination) will shorten
the life expectancy of sensors.

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4.0 Calibration
Analyzer calibration must be verified on a daily basis. Improper calibration may result in an
incorrect reading, delivering inaccurate levels of gas being monitored.
Nuvair offers two gas testing kits for the Analyzer Trio. A Helium free gas is
recommended. See addendum for more information.
Analyzer calibration must be verified on a daily basis. Improper calibration may result in
an incorrect reading, delivering inaccurate levels of gases or moisture being monitored.
This Analyzer must always be checked with a calibration gas and used with gases
regulated and supplied at atmospheric pressure (0 psi). Use of gases at higher
pressures may result in incorrect readings and may damage the Analyzer. Inaccurate gas
analysis can lead to serious personal injury or death.
Checking Calibration or use of the Analyzer with a low battery may result in inaccurate
readings. Inaccurate gas analysis can lead to serious personal injury or death.
If the Analyzer has been subjected to a recent change in ambient temperature, allow it to
stabilize for one hour before checking calibration.
Verify calibration on a daily basis. Breathing gas applications require the use of a certified
calibration gas with no moisture concentration and flow rate of 1.0-5.0 L/min. The equipment to
produce this flow is available from Nuvair. See Spares and Accessories section.
To assure the greatest accuracy for other applications, use the calibration gas concentration
closest to the expected concentration in the gas being measured.
Flow Restrictor/
Regulator Assembly
Nuvair Calibration Gas Specs:
CO 10 ppm
CO21000 ppm
Nitrogen Balance

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5.0Operation of Analyzer Trio
5.1 Turning on Analyzers:
1) Attach a 1.0 to 5.0 L/min flow of ambient air using the battery powered air pump or
sample flow from a compressor pumping only ambient air, or calibration gas with a 21%
O2mixture to the Analyzer Trio. This is necessary for the Pro O2Analyzer to calibrate
accurately at startup.
If no other method is available, use a short length of neoprene hose attached to the air
input to suck air backward across the sensors. This will draw fresh ambient air into the
enclosure. DO NOT blow into the tube as expelled breath contains lower oxygen content
and will cause improper calibration.
2) Turn on each analyzer by holding down the On/Off button until the display shows the
startup cycle.
3) Monitor for the low battery warning on battery powered units. Turn off the analyzers, plug
in the battery charger, and turn the analyzers back on if the battery warning appears.
4) Once fully cycled, the screens should display digits.
Low Battery
Indication

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5) The values on the displays will continue to change until they settle on the readings for the
current gas. Each of the Analyzers performs independently, and will display data in
accordance to their individual readings. User must read and consult the instructions for
each analyzer section in this manual to understand responses of each analyzer.
6) If verifying calibration, you may now attach the calibration test gas and verify the readings are
appropriate for the test gas mix (recommended is 1000ppm CO2, 10ppm CO, 40% O2, Nitrogen
balance provided by Nuvair).
a. If the values do not coincide with the test gas mix, refer to individual analyzer instructions
for calibration and troubleshooting.
Gas, even under moderate pressures, can cause extreme bodily harm. Never allow any
gas stream to be directed at any part of your body.
Never expose the sensor to pressures above atmospheric pressure or you may cause
damage to the sensor and/or receive false readings. Damaged Sensors will not provide
accurate gas analysis. Inaccurate gas analysis can lead to serious personal injury or
death.
It is very important that the calibration take place at atmospheric pressure and with
calibrated test gas that has no moisture in it.

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5.2 Threshold Alarms
Each Analyzer has independent threshold alarms that are user programmable.
User should confirm that each of the threshold alarms programmed in the analyzers
matches the desired value of the gas to be analyzed.
5.3 Powering off
Hold down the On/Off button for a couple of seconds on each of the analyzers in the
Analyzer Trio. The Analyzer will display “OFF” and then go blank.
6.0Factory Reset
In case it is necessary to reset any of the analyzers to their factory settings, follow the
instructions outlined in the manual for the specified analyzer.
Resetting the Analyzer will result in all user programmed alarms and calibration being
erased and set at factory defaults.
Screen
Example

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7.0 Maintenance
7.1 Analyzer Care
Analyzers immersed in liquid or stored in wet environments may not operate properly.
This may result in incorrect readings. Incorrect gas analysis may result in personal
injury or death.
Protect the analyzer from excessive shock and impact. Excessive shock and impact may
result in incorrect readings. Incorrect gas analysis may result in personal injury or
death.
Protect the analyzer from exposure to hyperbaric environments. Exposure to hyperbaric
environments may result in incorrect readings. Incorrect gas analysis may result in
personal injury or death.
•Do not clean Analyzer with anything other than a damp soft cloth.
•Do not immerse in liquid, leave unprotected outside, or store in a wet environment.
•Protect Analyzer from excessive shock and impact.
•Protect Analyzer from excessive exposure to sunlight and extreme temperatures.
•Do not use the Analyzer in a hyperbaric environment.

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7.2 Battery Replacement
Be sure to dispose of spent, leaking, or damaged Battery properly, according to local
regulations.
The following pictures illustrate the steps required to replace the batteries in the Analyzer.
1. Unplug battery
2. Pull battery away from housing
3. Replace with Nuvair supplied battery.
7.3 Sensor Replacement
The Analyzer Trio has two user changeable sensors The O2and CO sensors. These
sensors have various life expectancies and should be replaced immediately if accuracy is of
concern.
The CO2sensor is currently not user replaceable and the unit must be shipped to Nuvair for
service.
If damage occurs, send the analyzer back to Nuvair for inspection and Nuvair will determine
if the unit can be repaired or needs to be replaced.
8.0Programming of the Analyzers in the Analyzer Trio
The proceeding sections will outline the operation of each of the individual analyzers. There are
similarities in how each of the analyzers operate and are programmed. Take extra care in
reading the sections especially the alarm settings as each has a different program for tripping
the alarms. In some cases the alarms are tripped upon reaching the set value and in others the
alarm is tripped until the set value is reached. Refer back to the section associated to the
analyzer you are programming whenever possible to confirm the proper alarm settings are being
programmed.
Battery has two
Velcro strips holding
it in place

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9.0Pro O2Alarm Analyzer
The Pro O2Alarm Oxygen analyzer measures oxygen (O2) levels in gases in the range of 0.0 to
100%. The Analyzer is designed to verify O2concentration in stored gas cylinders, enclosed
spaces and with compressors pumping nitrox. When used in breathing gas applications,
redundant Analyzers must be used for verification. In diving, for example, one Analyzer must be
used to monitor oxygen during breathing gas production and a second independent Analyzer
must be used to verify the oxygen content of the breathing gas prior to diver use.
When using the Analyzer for diving applications with mixed gases other than air, you
must first obtain proper instruction from a certified diving instructor with a nationally
recognized training agency qualified in mixed gas diving. Improper use of this analyzer
may result in incorrect gas analysis which can lead to serious personal injury or death.
The Analyzer is includes an internally mounted Sensor
with audible and visual alarms. Large Digital Display
and controls are environmentally sealed.
The Analyzer uses a regulated flow of gas within the
analyzer to deliver sample gas to the sensor.
Pressurized gases must be regulated to avoid damage
to the analyzer. Use of this Analyzer in a hyperbaric
chamber will void the owner’s warranty.
The Analyzer comes in a high impact storage case. It
is ready for use after calibration with appropriate
certified calibration gases.
This analyzer is designed for use at atmospheric pressures only. It is not designed for
exposures in a hyperbaric chamber. Use of this analyzer in a hyperbaric chamber will
result in incorrect readings and may damage the unit.
Although the Analyzer is a rugged instrument, careless handling or abuse may result in
damage to the Analyzer resulting in inaccurate gas analysis. Inaccurate gas analysis can
lead to serious personal injury or death.
Breathing gas must always be analyzed by two separate Analyzers, with one used for
production and one used for analysis after production. Never depend on a single
Analyzer during both gas production and delivery. If the Analyzer readings do not agree,
both units must be recalibrated. Inaccurate gas analysis can lead to serious personal
injury or death.
On/Off
Programming
buttons
Alarm Light
Display

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9.1 Pro O2 Analyzer Controls
9.1. O2Analyzer Display
9.2 O2Analyzer Alarm
The Analyzer includes an audible alarm that is activated when the sensor reaches a user
programmed minimum % of oxygen and maximum % of oxygen. The alarm will not clear
until the concentration of O2moves into the threshold programmed by the user.
9.3 O2Analyzer Sensor
The Analyzer uses an electrochemical O2sensor to measure O2content in gases. The
sensor is disposable and user-replaceable, with a life expectancy of up to 24 months
depending on usage. The sensor is designed for use at atmospheric pressure (0 psi). The
gas mixture to be analyzed must be regulated accordingly, and any potential for pressure or
vacuum must be avoided.
Digital
Display
On/Off Button
Adjust Button
Program Button
Active Oxygen
Reading
0 – 100 %
In .1% increments
Alarm
Light
Alarm Light
Activated
Alarm Visual
on Display

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9.2. O2Analyzer Calibration
Oxygen Analyzers must be calibrated before each use. Improper calibration may result
in the use of incorrect breathing gas mixtures, which may cause serious injury or death
to the person using the gas mixture.
Calibration or use of the Analyzer with a low battery may result in inaccurate readings.
Inaccurate gas analysis can lead to serious personal injury or death.
When Analyzer calibration is performed at different atmospheric conditions than the gas
being measured, a calibration correction value may be required. Improper calibration
may result in the use of incorrect breathing gas mixtures, which may cause serious
injury or death to the person using the gas mixture.
If the Analyzer has been subjected to a recent change in ambient temperature, allow it to
stabilize for one hour before checking calibration.
During the warm up time if the oxygen percentage of the mixed gas flow is different from
the value of calibration set in the instrument, a failed calibration is obtained and a wrong
analysis value will be displayed.
9.4 Pro O2Calibration Methods
Calibration should always be performed at the same temperature and humidity conditions as the
gas being measured. This is not always possible, for example, in a tropical environment where
dry breathing gas from a high-pressure scuba cylinder will be measured after Analyzer
calibration has been performed in the warm, humid ambient air. Under these conditions a
calibration correction value may be required, or dry air must be used for calibration. It may be
required for the analyzer to be auto calibrated to a certified calibration gas.
Obtain proper training before attempting special calibration procedures. Improper
calibration may result in the use of incorrect breathing gas mixtures, which may cause
serious injury or death to the person using the gas mixture.
To assure the greatest accuracy for other applications, use the calibration gas concentration
closest to the expected concentration in the gas being measured.

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9.5 Pro O2 Analyzer Operation
Prior to each Analyzer use:
1) Connect the battery powered pump. Before switching on and during the warm up, air
must be flowing over sensor for proper calibration. The flow rate of air must equal 1.0 –
5.0 L/min.
2) Turn unit on by holding on/off button until display shows “On”, after that the “Att” (Wait)
message will be displayed for about 4 seconds, and then the sensor auto-calibration
procedure is started.
3) The auto-calibration last about 5 seconds; during this time the display will show the
message “CAL” and “Att” alternatively. Be sure during this time the sensor is exposed to
an air mix with oxygen percentage as programmed in the O2c (calibration) parameter
(SEE PROGRAMMING PROCEDURE). By default, for simplicity, the O2c value is set at
21% that corresponds to the percentage of Oxygen in free air.
4) At the end of the warm up and calibration, the display will continuously show the oxygen
content of the air flow. The instrument is now ready to read oxygen concentration of the
gas.
Gas, even under moderate pressures, can cause extreme bodily harm. Never allow any
gas stream to be directed at any part of your body.
Tip: You can check the battery life and current temperature by holding Adjust button for 3
seconds. The display will alternate from battery life to current temperature (Celsius) twice before
returning the home screen.
Never expose the sensor to pressures above atmospheric pressure (0 psi) or you may
cause damage to the sensor and/or receive false readings. Damaged Sensors will not
provide accurate gas analysis. Inaccurate gas analysis can lead to serious personal
injury or death.